April 19, 2012 10:35PM
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Registered: 15 years ago
Posts: 609 : SoCal |
2 years ago, I replaced the original cat on my 1984 BMW 325E. Immediately after installation, the car underwent a smog test and HC and NOX were within limits.
Last week, I was driving when a sound like an angry beehive began to eminate from under my car. I got home, got under the car, tapped on the cat with my fist and it sounds like marbles loose in there. The cat I installed 2 years ago has an 8 year warranty on it. I had the car smog tested today and HC and NOX were slightly higher but still within limits. I called the manufacturer of the cat and they are trying to tell me that something is wrong with my car, the cat must have overheated which can occur with leaking injectors or a bad muffler. Muffler was replaced with new factory unit 3 years ago. I was told by a friend who is a car mechanic if my injectors were leaking, my mileage would be pretty poor. My milage is still pretty good. Is the manufacturer just trying to dodge the warranty on this? alan |
April 20, 2012 06:47PM
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Registered: 15 years ago
Posts: 797 : Ottawa |
April 20, 2012 06:51PM
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Registered: 15 years ago
Posts: 1,538 |
Different cat Ferd; this one is obviously an AM replacement. I have had two AM cats replaced that failed AirCare; one in two years and the other in four years. They are made that way on purpose |
April 21, 2012 08:58AM
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Registered: 15 years ago
Posts: 609 : SoCal |
April 21, 2012 12:01PM
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Registered: 15 years ago
Posts: 1,538 |
April 21, 2012 03:01PM
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Registered: 15 years ago
Posts: 1,869 : Amagansett, New York |
That could be a problem; cats get pretty attached to warm hoods! Edited 1 time(s). Last edit at 04/21/2012 03:01PM by rkj. |
April 23, 2012 01:59PM
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Registered: 15 years ago
Posts: 609 : SoCal |
April 24, 2012 09:56AM
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Registered: 15 years ago
Posts: 670 |
May 02, 2012 09:01AM
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Registered: 15 years ago
Posts: 1,869 : Amagansett, New York |
How would you check for this, and what values on the meter would you use??? Please |
May 02, 2012 10:50AM
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Registered: 15 years ago
Posts: 670 |
It should be switching from low level (+/- 0.2 V) to high level (+/- 0.8 V) about once a second. On a slow meter you would see a reading of about 0.45 V. If low level isn't low enough, or if high level not high enough or if the switching takes longer, the sensor's on its way out. If the level remains either high or low (no switching), the engine is running lean or rich.
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May 02, 2012 03:22PM
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Registered: 15 years ago
Posts: 609 : SoCal |
May 03, 2012 01:07PM
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Registered: 15 years ago
Posts: 670 |
May 14, 2012 08:49PM
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Registered: 15 years ago
Posts: 1,869 : Amagansett, New York |